1321441021042 has 4 divisors (see below), whose sum is σ = 1982161531566. Its totient is φ = 660720510520.

The previous prime is 1321441021001. The next prime is 1321441021093. The reversal of 1321441021042 is 2401201441231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1054977548641 + 266463472401 = 1027121^2 + 516201^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1321441020998 and 1321441021016.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330360255259 + ... + 330360255262.

Almost surely, 2^{1321441021042} is an apocalyptic number.

1321441021042 is a deficient number, since it is larger than the sum of its proper divisors (660720510524).

1321441021042 is an equidigital number, since it uses as much as digits as its factorization.

1321441021042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660720510523.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 1321441021042 its reverse (2401201441231), we get a palindrome (3722642462273).

The spelling of 1321441021042 in words is "one trillion, three hundred twenty-one billion, four hundred forty-one million, twenty-one thousand, forty-two".